Edwin f



April 1947' E. F. BRITTEN, JR 2,419,760

OPERATION CONTROL MEANS FOR CALCULATING MACHINES Filed July 15, 1945 3 Sheets-Sheet l INVENTOR EdwinE'B April 29, 1947. BRlTTEN, JR 2,419,760

OPERATION CONTROL MEANS FOR CALCULATING MACHINES Filed Jtily 13, 1945 3 Sheets-Sheet 2 37.9 3%; 346 389 1 i Q 0 r 376 1 n 1 I (Q1 I R 3J a; 3% .952 aw 353 35f I j m V E211 B'i Q J r I en r- April 29, 1947- E. BRITTEN, JR 2,419,750

OPERATION CONTROL MEANS FOR CALCULATING MACHINES Fiied July 13, 1 945 3 Sheets-Sheet s I I INVENTOR ZZZ WW E Q FB iHe/ Jr.

Patented Apr. 29, 1947 OPERATION CONTROL MEANS FOR CALCULATING MACHINES Edwin F. Britten, Jr., Short Hills, N. J assignor to Monroe Calculating Machine Company, Orange, N. J a corporation of Delaware Application July 13, 1945, Serial No. 604,852

4 Claims.

The invention has relation to calculating machines and more particularly to means for controlling additive and subtractive registrations and shifting of the numeral wheel carriage toward the right or left, respectively.

The invention consists in the novel construction and combination of parts, as set forth in the appended claims.

In the accompanying drawings, illustrating the invention,

Fig. 1 is a left side elevation of the rear portion of a calculating machine, with the casing removed.

Fig. 2 is a right side elevation of certain operation controlling keys and associated parts.

Fig. 3 is a rear elevation of the motor drive and carriage shifting mechanism.

Fig. 4 is a perspective view of the carriage shifting mechanism and certain operation controls.

Fig. 5 is a left side elevation showing a modified structure of certain parts illustrated in Fig. 1 and of certain additional parts used in automatic division calculations.

Fig. 6 is a similar view of other automatic division parts.

Theinvention is shown as applied to a Monroe calculating machine, constructed in accordance with the disclosures of United States Patents No. 1,566,650, entitled Operating means for calculators, and issued to George C. Chase on December 22, 1925; and No. 1,888,161, entitled Automatic control for calculating machines, and issued to the same inventor on November 15, 1932. The devices of these patents are shown as redesigned in accordance with the disclosure of United tates Patent No. 1,964,211, entitled Calculating machines, and issued to Austin A. Overbury on June 26, 1934.

In accordance with these disclosures numeral wheels I3 (Fig. 5) of a product-dividend register are mounted in a transversely shiftable carriage 2 (Fig. 1), and are rotated additively or subtractively upon operation of forwardly or reversely driven differential actuators 5 (Fig. 2) connected with the numeral wheels by intermediate gearing (not shown). Differential actuators 5 are driven from an electric motor I (Fig. 3), through the medium of a differential gear clutching and reversing mechanism, having driving connection with a shaft 350, connected in turn to the differential actuators through gearing I4 (Figs. 2 and 3).

Registrations not involving automatic shifting of the carriage 2 are controlled by a plus bar I20 and minus bar I2I (Fig. 2), having link connections 123 with a rock shaft I25 extending across the machine and provided with a setting plate I28 (Fig. 1) having spaced shoulders adapted to engage a pin I30 in reversing clutch lever III, fulcrumed on the frame at 2. Depression of plus bar I20 will rock shaft I25 in a clockwise direction as viewed in Fig. 2, setting the lever III from neutral position into adding position, in which a hook arm N4 of said lever will engage with a lug upon gear I05, forming one leg of the differential drive. Normally the gearing comprising both working legs of the differential will rotate idly, as described in Patent No. 1,566,650, interruption of the movement of one leg causing the planet gears to move in their orbit in one direction and interruption of the movement of the other leg causing a movement in the opposite direction. Depression of the minus bar I2l will effect opposite rocking movement of the members I25, I28 and III, to bring a hook arm II3 (Fig. 6) of lever III into engagement with a stop III] for the other leg of the differential, whereby the drive of the differential actuators 5 will be effected in the reverse direction.

Upon manual release of plus bar I20 or minus bar I2I the parts will be brought to rest in full cycle position as follows:

Setting plate I28 is provided with opposed cam faces, operating in the depression of either bar, through a roller I33 to depress the rear end of a lever 134. This movement of lever I34 carries a pawl I36, mounted upon said lever into position beneath a trigger 3I normally engaging a pawl 25 mounted upon a stop arm 24, and serving to hold said pawl inactive. Upon release of the key, suitable springs will return lever I34 to normal position, causing pawl I36 to raise trigger 3I and release pawl 25, the latter dropping into position behind a shoulder 21 of rock arm 22, connected to shaft I54 by crank 20 and link 2!. Shaft I54 is driven in one-to-one ratio with actuators 5, by means of gearing I, shaft 350, etc. Engagement of pawl 25 with shoulder 21 connects the arms 22 and 24 to operate in unison, the latter arm being carried against a fixed stop 29, to prevent further rotation of the parts in the original direction. Upon the rebound of the parts from stop 29, a lug of pawl 25 will engage with the end of trigger 3| and lift said pawl out of engagement with shoulder 21.

In the movement of arm 24 against stop 29 a rearward extension I44 of said arm will engage a pin I 45 of reversing clutch lever I I I, and through the action of one or the other of two opposed cam faces of said extension, will move said lever to its by engagement of pin 38ft into the path of movement of a pin 388, which is fixed in a disk rotating with shaft 31%, thereby preventing movement of the shaft beyond full cycle position. Because the shaft may be rotating in either direction, pin 388 may engage extension 38'! upon one or the other thereof, for which reason the disk to which pin is fixed has pin and slot lost motion driving connection with gear 3'51, fast to shaft SIS.

It will be apparent that upon release of the key the worm 358 will complete the shift into the next operating position of carriage 2, whereupon pin will release clutch this clutch effecting the release of clutch lever III, and thereafter completing its cycle and being released by engagement with the detent Elli.

During this cycle of clutch if. a cam 3% (Fig. 3) will be rotated. this cam engaging an extension 392 of link and moving the toggle links 362 back into latching position.

Restoration of toggle 352 will move link 315 to the left, thus restoring disks 315 and 38;: to their left-hand position and releasing arm 38! from pin 383. Detent 373 will now be held by a spring 399 in contact with the peripheral flange of clutch 3li, ready to drop into clutch disengaging position at the end of the restore cycle. It may be noted that spring is stronger than spring 399. Upon disengagement of clutch 31! the upper end of detent 373 will be removed from the notch of disk 385,'and in order to provide a locator which will hold the carriage shift parts in position while they are standing still, a spring biased detent 389, loosely mounted upon shaft 365, normally engages the notch of a disk 35 33, fast upon shaft 3'59. Upon breaking of toggle 362, a cam edge of link 3'56 will engage a lower extension of detent 359 and remove the same from the notch of disk 35 6, holding the detent disengaged until toggle 362 is restored.

In normalizing the shift control mechanism, release of the main clutch is not effected until clutch 3H starts to operate, and shift shaft 319 must be locked before clutch ill! can be engaged. This condition illustrates the utili y of employing clutches (352, 353) of the fliClliOifl type, since shift clutch 353 may slip briefly during the normalizing cycle, so that the driving element thereof may rotate while engaged with the driven element, after the latter is locked against rotation.

Automatic division Division is performed in well known manner, by subtracting the divisor from the higher orders of the dividend until the remainder becomes negative, thereupon making a corrective additive cycle, shifting the register carriage to the left and repeating the operations, whereupon the quotient will appear upon a cycle counting register (not shown).

This is all effected automatically, upon setting of a division key or lever am into active position. As shown, the lever i rotated counterclockwise from the normal position illustrated in Fig. 5.

Lever 29!, which is fulcrumed to the frame at 202 (Fig. 6) in moving to rearward position, will bring pin 285 into engagement with a click pawl 319, mounted upon the forward end of an arm 208, which arm is pivoted upon the fulcrum H2 of reversing clutch lever III. In this movement, pin 205 will rock the arm 258, a projection in the rearward end of said arm acting upon lever HI to bring the hook arm H3 of said lever into engagement with the subtractive member H0 of the differential gear train, thus setting the machine in operation subtractively. Pin 2G5 passes entirely beyond pawl 3 l 9, in this movement, leaving lever HI free to be adjusted from one to another of its three positions.

The setting of lever 20! has adjusted certain control devices into position to effect the reclutching of lever H! in its reverse operating position.

For this purpose a finger 209 (Fig. 6) is pivotally connected to the reversing clutch lever l l I, being normally held in inactive position by a suitable spring. As lever '20] is moved to active position, arm 268 will contact with finger 209 and will rock the same counter-clockwise about its pivot, as seen in Fig. 6, until it is caught and held in active position by latch 213-. In this position finger 2&9 is so adjusted that Whenever lever H l is brought into its neutral position, the upper end of said finger will lie in the path of movement of a crank pin 220 carried by the shaft i5 1, pin 226 thus acting to throw the lever Ill into additive or into subtractive position according to the direction of rotation of shaft I54.

Upon the completion of the quotient figure registration in each denominational order, the registration in this order is terminated, register carriage 2 is shifted to the left and the registration in the neXt lower order is initiated by means of the full cycle stopping devices above described and additional devices for modifying the action of the stopping devices, all of these means, having been set into active position, being con trolled in their operation through the trigger 35.

Push rod 4'! (Fig. 5) is intermediately pivoted upon arm 24, the rear end of said rod being adapted for engagement by a stud 5E3 of the link 2!. At the end of an additive operation, crank arm 29, rotating counter-clockwise, as seen in Figs. 5 and 6, will be carried downwardly, through its dead center position, before the arm 24 engages stop 29, this movement bringing stud 50 against the end of push rod 47 and acting to hold the forward end of this rod upward, in contact with a stud 5! of a hook arm 26L At the same time the forward movement of arm 24 will carry arm 26! forwardly about its pivot 53. It will be noted that where the movement of arm 24 follows a subtractive operation, the crank 2 will sweep upwardly through dead center position, and push rod 4'! will be free to pass under stud 5|. Automatic shifting is controlled by a member 252 carried by a lever 52 and adapted to engage beneath the hook of arm Zti when lever ZZOI is set to active position. For this purpose a plate 253 is pivoted at 53, normally held in raised position by engagement of the pin 205 of lever 20! with a rearward seat of the plate as seen in Fig. 5, movement of lever 20! to active position bringing pin 295 into contact with a forward seat of said plate, adapted to permit the plate to drop into its lower position. The member 262 has a lug 264 engaging plate 253, so that as said plate drops to its lower position, member 262 is rocked rearwardly by a suitable spring, into contact with the hook of arm ZSI.

A link 393 connects lever 52 with a crank arm of shift initiating shaft 365, this crank arm not being shown in Figs. 3 and 4, since it is not employed unless the machine is equipped for the performance of automatic division. It will be apparent that when arm 24 is moved forwardly at the end of an additive cycle of the parts, push rod 4! will operate members 26! and 262, rocking lever 52 and shaft 355, to disengage clutch 352 and engage clutch 353, to start a shift of register carriage 2 in the manner previously described. Of course, arm 24 and the parts connecting that arm wi h shaft 36-;- will be displaced only momentarily, so that at the end of a single cycle of shifting movement the carriage will be brought to rest.

At the end of the shifting operation, clutch lever ill will not be centralized, as in the operations previously described, since i is necessary in division calculations that the machine should continue with the computation of the next quotient, or in other words that a subtractive operation should be initiate when the shift is completed. It will be recalled that at the end of the corrective additive cycle clutch lever i i i is thrown into subtracting position, and since the reverse gear ng controls a shift to the left in the same manner that it controls subtraction, the carriage was shifted accordingly. Therefore, at the end of the shifting movement, clutch lever Ill is properly set for continuing the operation, and the previously described change from engagement of clutch to engagement of clutch 352 is all that is necessary in order to continue division operations. Therefore, in the form of mechanism illustrated Fig. 5 means are provided for disabling the link connection between cam follower 33:50. and arm 2 Thus, in this form of the mechanism a link 3514 is pivotally connected with arm 24, and its rearward end has a lug lying normally in the path of movement of follower Slta. The rearward end of link 39 is con-- nected through a link 395 with a bell crank lever 3%, fulcrumed upon the machine frame and connected at its upper end with the pin 235 of division lever Zfll. In the normal position of the parts, illustrated in Fig. 5, bell crank lever 396 will support the rearward end of link 394 in the position described. However, upon setting of division lever 29! to active position, bell crank lever 396 will be rocked clockwise, and the rearward lug of link 394 will be lifted and held out of the path of movement of follower 374a.

ivision operations are concluded as follows:

A lug I98 (Fig. 6) is provided on the carriage said lug being adapted as the carriage is seated in last place position to depress a lever 223, having pin and slot connection with a link 3i l, piv oted upon the division lever 23!, this movement carrying shoulder of said link into the path of movement of an arm 3S4 pivoted upon the stud H2 and engaged b the roller 50 of link 25. When the carriage arrives in the last place posit-ion, the parts are in rotation in a subtractive direction, shaft IE; being rotated clockwise as seen in Fig. 6 until the arm 24 is carried against the stop 2t. During this movement of shaft I54 stud 5% will, through arm 3M and link 3i i, restore lever 2Q! to inactive position.

After th contact of arm 24 with stop 29 the parts will rebound and the clutch will be thrown into additive position. This movement of the clutch will bring the latch H3 of the reversing finger 269 against the pin 2% of the retracted division lever 2M, will trip the latch and allow the reversing finger to be restored to inactive position, so that the parts will operate to stop the machine in full cycle position, as described above in connection with single order oration.

I claim:

1. In a calculating machine having a transversely shiftable carriage and numeral wheels mounted thereon, reversible rotary differential actuators for said numeral wheels reversible rotary carriage shifting devices; cyclically operable dr've means common to said actuators and shifting devices including clutch and reversing elements adjustable to effect forward or alternatively reverse rotation thereof, means adjustable to en age the drive me ns alternatively with the actuators or with the s fting devices, and adjusting and clutch control means including power el ments operable at the conclusion of a shii" operation to disengage the clutch elements to readjust the engaging means.

2. In calculating machine aving versely shifts-ole carriage and ruinleral wheels rotary carriage shifting devices; cyclically operable drive cc r id actuators and ing devices in elements ustable to forvi d or alternatively re 'se rotation cticr. clutch. between the e We means actuators, a 5 1c n clutch the shiitn g devices, -gage one or alternaiid clutches.

no other a. calculat machine h g a transiifta I cral wheels mounted there 1 reversible lOLZtly differential actuators for said numeral wheels and reversible rotary carriage shifting devices; cyclically operable drive m is c" non. said actuators and means clutch devices,

and the between t 1e drive me means adjus able to e so other or" said chit thereof,

gle, and power meanlatching position.

In a calculatin a versely sl ifta-ble csrria e and. numeral vheels mounted thereon, reversible rotary differential actuators for said numeral Wheel re ersible rotary carriage shifting dev ce" and means including a key for controllin r. ion calculations; cyclically operable drive means common to said actuators and shifting d ce including cl itch and reversing elements adjustable to foru -.rd or alternatively reverse rotation thereof, means adjuste to engage the drive means alternatively with the actuators or with the shifting devices, power means operable at the conclusion of shiit- -n1ents for readd elements nor- .chine having trans- Number Name is ate 1,292,513 Ptechnitzer Jan. 28, 1919 1,964,211 Overbur June 26, 1934 2,009,010 Frilen July 23,

Certificate of Correction Patent No. 2,419,760. April 29, 1947. EDWIN F. BRITTEN, JR.

It is hereby certified that errors appear in the printed specification of the above numbered patent requiring correction as follows: Column 3, line 5, for the before mechanism read this; column 7, line 14, after the syllable tient and before the comma insert the Word figure; column 8, line 53, claim 4, before forward insert efiect; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

THOMAS F. MURPHY,

Assistant Commissioner of Patents.

fi V RR\\ Certificate of Correction Patent N 0. 2,419,760. April 29, 1947.

numbered patent requiring correction as follows: Column 3, line 5, for the before mechanism read this; column 7, line 14, after the syllable tient and before the comma insert the Word figure; column 8, line 53, claim 4, before forward insert efi'ect; and that the said Letters Patent should be read With these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 23rd day of September, A. D. 1947.

THOMAS F. MURPHY,

Assistant Oommz'ssz'oner of Patents. 

